MITSUBISHI MATERIALS CORPORATION
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MHS

OPERATIONAL GUIDANCE
Drill Holding Drill Length Drill Installation Installation Tolerance
Drill Holding Drill Length Drill Installation Installation Tolerance
Through Coolant Type Coolant Handling Thin Workpiece Interrupted Cutting
Through Coolant Type Coolant Handling Thin Workpiece Interrupted Cutting
Stepped Holes Burring and Workpiece Chipping    
Stepped Holes Burring and Workpiece Chipping    
OPERATIONAL GUIDANCE FOR THE MNS TYPE LONG DRILL (L/D 10, 12, 15, 20, 25, 30)
FLAT FACE DRILLING
Drilling a blind hole

1. Drilling a pilot hole
1. Drilling a pilot hole
  1. xxxxxx
2. Initial cutting with the long type drill
2. Initial cutting with the long type drill
  1. xxxxxxxxx

3. Drill the deep hole
3. Drill the deep hole
  1. xxxxxx
4. Drill retraction
4. Drill retraction
  1. xxxxxxxxxxx

INTERRUPTED DRILLING
Drilling and breaking through on irregular faces or angles

1. Spot facing
1. Spot facing
  1. xxxxxxx
2. Drilling a pilot hole
2. Drilling a pilot hole
  1. xxxxxxxxx

3. Initial cutting with the long type drill
3. Initial cutting with the long type drill
  1. xxxxxxxx
4. Drill the deep hole
4. Drill the deep hole
  1. xxx

5. Breaking through
5. Breaking through
  1. xxxxxxxxxxxxx
6. Drill retraction
6. Drill retraction
  1. xxxxxxxxxxxxx